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440 avs on a 383 worth it??
#705732
05/23/10 04:07 PM
05/23/10 04:07 PM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
OP
master
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OP
master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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buddy of mine has a 4640 AVS and i think its got the bigger primarys on it. is this swap worth the cost of the carb and rebuild? the 383 is stock with slight manifold plenum and gasket match, 1/2 4-hole spacer, 915 close chamber heads stock valves, 9.75 cr, stock bottom end, small vodoo cam 220/226 @.050, stock HP exh manifolds with 2.5" x pipe exhaust, 3.23 gear, 4-speed. in a RR. the car does seem to run out of breath over 5,400 rpm. Is this carb the 750 cfm large primary carb? whats a fair price for one. Thanks
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Re: 440 avs on a 383 worth it??
[Re: ademon]
#705738
05/23/10 11:11 PM
05/23/10 11:11 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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The 440 oe avs's aren't 750 cfm and all of them (oe avs's) are emission carbs w late 60's early 70's technology (4 decades old) and you can measure the rods/jets and get an eddy strip kit w similar size rods/jets and use flat AFB/eddy metering rod covers to play w the main metering. On a recent thread a guy said Sorensen AFB kits are $18.99 which is cheap so an oe AVS kit may be similarly priced. As said if the primaries are larger it'd for sure run harder but I'd much rather have a 66-67 large oe AFB or an eddy but if the price plus the kit and your time to rebuild it makes it worthwhile then yes I'd do it. EDIT I have an OE AFB you can have for $29
Last edited by RapidRobert; 05/24/10 12:38 AM.
live every 24 hour block of time like it's your last day on earth
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Re: 440 avs on a 383 worth it??
[Re: RapidRobert]
#705739
05/24/10 12:40 AM
05/24/10 12:40 AM
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Joined: Feb 2003
Posts: 10,218
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,218
Someplace you aren't
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I got almost an identical setup as you, car and all.
My 383 is a OEM build HP that has some bolt ons. It had a 750 Eddy on it. It certainly had more zip higher in the range with the 750. Of course that model carb is junk overall, so it had to go.
I put an AVS off a 440 on it. Too bad it is the small version, but it happens to be the same size as the 383 got, so it isn;t all that bad.
It is for sure choked up now. I can't wait to get a bigger carb on it.
I want my fair share
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Re: 440 avs on a 383 worth it??
[Re: SomeCarGuy]
#705740
05/24/10 02:07 AM
05/24/10 02:07 AM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,163
CT
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Not to get off topic but what paint did he use on that engine? It looks WAY closer than the crap Mopar Performance is peddling.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 440 avs on a 383 worth it??
[Re: rss]
#705743
05/24/10 06:17 AM
05/24/10 06:17 AM
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Joined: Nov 2009
Posts: 520
New Zealand
nz383man
mopar
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mopar
Joined: Nov 2009
Posts: 520
New Zealand
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I run a '70 Barracuda close to your specs (although my compression is lower) that will do slightly quicker quarters with the smaller 383 carb than it will with the bigger 440 carb. The engine will fall flat (in warm air) with either carb at about 5500 so I think the manifold is the restriction rather than the carb.  Both carbs were tested with many combos of rods, jets, squirters & air door settings using LM2, widband O2 sensors as well as 1/4 mile times & trap speeds. I do use a snubstack it is a K7N 85-0700 for Edelbrock & Carter square-bore carbs. They are made for the new Carters (Edelbrock 1400 1404 1405 1406 1407 1411) not the old AVS, it is not a simple task but they can be made to fit quite neatly with some work.
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Re: 440 avs on a 383 worth it??
[Re: GO_Fish]
#705744
05/24/10 09:14 AM
05/24/10 09:14 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
I think a 750DP would work like a MoFo on your application. Is the 440 AVS 750?
Did you really think Mr. Yuck could enter a conversation about AVS without bringing 750DP into the conversation? 
Short answer, yes it should be worth your trouble to upgrade. Just be sure the primaries are the larger size, not all 440's got the large version.
Price could be the issue. There will be guys restoring HP 440's that want/need this carb and are willing to pay for it. That would be harder for you to get a low price. 
hey I like the AVS fine. And it will be an upgrade, but the holley will run better. Is a 440 AVS 750? I thought they were smaller. Shoot I loved the old Thermoquad I had in a 440 charger until my bro flood it and BOOM tried to catch my car on fire. Never worked right after that.
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Re: 440 avs on a 383 worth it??
[Re: Mr.Yuck]
#705745
05/24/10 01:44 PM
05/24/10 01:44 PM
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Joined: Jan 2003
Posts: 3,967
S.I. N.Y.
1MYTGTX
master
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master
Joined: Jan 2003
Posts: 3,967
S.I. N.Y.
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The 4640SA is a 625 CFM carb for a '69 440, automatic with A/C....heres mine
1MYTGTX
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Re: 440 avs on a 383 worth it??
[Re: ademon]
#705747
05/24/10 10:19 PM
05/24/10 10:19 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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There was an article a few years ago in one of the mopar magazines where they were playing around with a 340 and they tried an AVS from a HP 440 and it picked up accross the board on the dyno so I would have a hard time beleiving a 383 would not see a nice gain too. The basic 440, 340 and 383 AVS were all the same size while the 440 HP AVS was bigger. As a side note I had a 440 HP AVS on my mild 318 for a while and it ran just fine.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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but i want to keep it stock looking + keep the dashpot for the 4-speed
HUSTLE STUFF recomendation from the past i think,do it. 
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